Writer of notes on a piece of poetry (5)
I believe the answer is:
defoe
'writer' is the definition.
(Daniel Defoe)
'notes on a piece of poetry' is the wordplay.
'notes' becomes 'de' (two musical notes).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'a piece of poetry' becomes 'foe' (I am not sure about this - if you are sure you should believe this answer much more).
'de'+'foe'='DEFOE'
'of' is the link.
Can you help me to learn more?
(Other definitions for defoe that I've seen before include "Daniel . . . . . wrote ''Robinson Crusoe'' (5)" , "Daniel -, Moll Flanders author" , "Writer of Moll Flanders" , "pamphleteer and novelist" , "Daniel --, English novelist" .)